41 results about "Electron transfer rate" patented technology

The application discloses a kind of gold nanoparticle loaded oxygen-doped ultrathin porous boron nitride film electrode and preparation method thereof, the preparation method includes the following steps: according to mass ratio 1:3-6:0.25-0.35, boric acid, urea, oxalic acid is prepared oxygen-doped ultrathin porous boron nitride, then gold nanoparticle is loaded oxygen-doped ultrathin porous boron nitride and coated on conductive substrate to form film electrode.The oxygen-doped ultrathin porous boron nitride film electrode loaded with gold nanoparticles prepared by the application has the advantages of large specific surface area, high electron-hole separation efficiency, fast electron transfer rate, etc., is a new type of film electrode with excellent photoelectric performance, meets the actual production demand, and has wide application prospect in photoelectrochemical field.The preparation method also has the advantages of simple process, easy operation, high preparation efficiency and low cost, and is suitable for large-scale preparation, which is beneficial to industrial application.

The invention belongs to the technical field of underground water pollution remediation functional catalytic materials and water treatment, and particularly relates to a modified iron heterojunction biomass slow-release material, a preparation method thereof and application of a coupled electric field in underground water organic pollutant remediation. The mushroom biochar is used as a carrier to load the modified zero-valent iron, so that the problem of iron agglomeration is effectively relieved; and the modified zero-valent iron grows in the three-dimensional pore channel of the charcoal in situ, so that the slow release of the iron active component can be realized, and the utilization efficiency of the oxidizing agent is improved. An electric field is built in the iron-carbon structure reinforcing material, so that the problem of slow mass transfer in an underground water medium is solved, and the surface accessibility of an oxidizing agent and pollutants is improved. The material not only can reduce the invalid consumption of an oxidizing agent caused by overhigh local Fe < 2 + > concentration, but also can drive directional electron migration through an electric field, realizes space-time matching and dynamic regulation and control of an electron transfer rate and an iron supply rate, forms an in-situ regeneration closed-loop system, and has a good application prospect in groundwater remediation.

The application discloses a kind of garden plant health condition detection and early warning system based on spectral analysis, including adjustable frequency excitation light source, fluorescence detector, quadrature phase-locked demodulation module, phase frequency characteristic analysis module, early warning control unit and early warning output terminal, adjustable frequency excitation light source emits broadband sweep frequency modulation perturbation excitation light, quadrature phase-locked demodulation module executes operation filtering natural background stray light to the electric signal collected, phase frequency characteristic analysis module extracts characteristic relaxation frequency parameter when absolute phase delay parameter reaches forty-five degrees phase angle, early warning control unit sends instruction lock frequency and applies saturated light flash pulse, system calculates dynamic apparent electron transfer rate parameter, and according to temperature drift compensation baseline, executes double tolerance threshold comparison determination plant physiological stress state.The application avoids the defect of detection frequency band misplacement, eliminates the interference of strong background light and air temperature fluctuation, realizes the multi-dimensional joint early warning of early physiological stress.

The invention discloses an electrode material which is simple in preparation method, high in performance and capable of stably producing hydrogen by electrolyzing water, and also discloses a preparation method of a photocatalyst for purifying wastewater by using a derivative of the electrode material. The preparation method of the electrocatalyst mainly comprises the following steps: etching a nickel metal substrate by using diluted hydrochloric acid; the preparation method comprises the following steps: preparing a first-stage product, dissolving the first-stage product with a bismuth source and molybdate in a reaction kettle, carrying out hydrothermal synthesis to obtain a hydrothermal product, carrying out high-temperature calcination on the obtained material to obtain a sample precursor and a part of byproducts, finally repeating the reaction once to obtain a high-activity electrode and related byproduct derivatives, mixing the two byproducts, carrying out high-temperature calcination, and grinding to obtain a second-stage product. According to the prepared catalyst, a bismuth source is introduced to serve as an additive, a NiMoO4 / Fe2 (MoO4) 3 composite film layer active phase is constructed on an NF substrate through a one-step hydrothermal-corrosion-growth method, the active phase and an NF framework are induced through a confinement effect to form strong interface bonding, the electron transfer rate is increased, and the electrode performance is remarkably improved by reducing the valence band position of the active phase. The preparation process is simple to operate, the morphology of the catalyst is controllable, and derived by-products generate higher economic benefits.

The invention belongs to the field of metal ion battery material synthesis, and particularly provides a sulfur-doped oxygen-nitrogen-enriched conjugated organic material and application thereof in Li < + > / Zn < 2 + > ion batteries. The preparation method comprises the following steps: firstly, preparing 2, 3, 8, 9, 14, 15-hexachlorodiquinoline [2, 3-a: 2 ', 3'-c] phenazine (HANT-Cl) by taking cyclohexanehexone and dichlorobenzene diamine as raw materials, and then synthesizing 6S6O and the derivative thereof by taking HATN-Cl, sodium sulfide nonahydrate and a naphthoquinone derivative as raw materials. The obtained electrode material contains a plurality of oxidation-reduction active sites, multi-electron storage can be carried out, the transfer rate of electrons is improved through the large pi conjugated structure of the conjugated quinoneazine material, and therefore the high theoretical specific capacity and the excellent rate performance are achieved. Due to the addition of the sulfur element, the oxidation-reduction potential of the material is improved, the energy density of a battery can be improved, and the material has a wide application prospect in a Li < + > / Zn < 2 + > ion battery system.

The invention discloses an enzyme biosensor for rapid detection of organophosphorus pesticide dimethoate as well as preparation and application of the enzyme biosensor, and relates to the field of electrochemical sensors. The method comprises the following steps: preparing GR / GCE, preparing AuNPs / GR / GCE, and preparing AChE / AuNPs / GR / GCE. Graphene and gold nanoparticles are compounded to form AuNPs / GR / GCE, the electrochemical impedance of the glassy carbon electrode is remarkably reduced, the effective specific surface area of the glassy carbon electrode is increased, the electron transfer rate of the surface of the glassy carbon electrode is increased, rich binding sites are provided for immobilization of enzyme molecules, the stability of enzyme is improved, and degradation or inactivation of the enzyme in the using process is reduced; acetylcholine esterase is used as a recognition probe, AChE / AuNPs / GR / GCE is constructed on AuNPs / GR / GCE in a self-assembly mode, dimethoate can prevent acetyl thiocholine iodide from being hydrolyzed to generate thiocholine, electrochemical response signals are reduced, and the dimethoate has good electrochemical response signals, so that the organophosphorus pesticide dimethoate residue is rapidly, accurately and safely screened on site.

The invention provides a silk-screen printing carbon electrode plate and a preparation method thereof, and relates to the technical field of electronic printing. The preparation method of the silk-screen printing carbon electrode plate comprises the following steps: etching at least one micron-sized groove in a working electrode surface area of a carbon electrode plate base material by adopting laser; carrying out plasma activation treatment on the surface with the groove so as to introduce an active functional group while increasing the specific surface area; and then coating the surface of the treated base material with carbon paste through a screen printing technology with optimized parameters to obtain the screen-printed carbon electrode plate. According to the invention, through synergistic modification of the physical morphology and chemical properties of the substrate, the adhesiveness of the carbon paste and the electrochemical active area of the electrode are improved fundamentally, and the electron transfer rate, the reaction sensitivity and the stability of the screen-printed carbon electrode plate are significantly enhanced.

The application discloses an amperometric current density stable MoS2 / Ni3S4 / CFP electrocatalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalytic hydrogen evolution. The application constructs a heterojunction interface between MoS2 and Ni3S4 through a hydrothermal reaction, and MoS2 and Ni3S4 generate a heterojunction on a carbon paper substrate to obtain the amperometric current density stable MoS2 / Ni3S4 / CFP electrocatalyst. The preparation of the composite material comprises the following steps: (1) dissolving nickel salt, urea and ammonium fluoride in water, stirring, and then placing the obtained mixed solution A and carbon paper in a hydrothermal reaction kettle for one-time hydrothermal reaction to obtain a nickel hydroxide precursor; (2) dissolving molybdenum salt and thiourea in water, stirring, and then placing the obtained mixed solution B and the nickel hydroxide precursor in the hydrothermal reaction kettle for two-time hydrothermal reaction to obtain the catalyst. The catalyst improves the electron transfer rate, increases the number of active sites, and exhibits excellent hydrogen evolution reaction activity and stability in the water electrolysis process.

The application discloses a kind of solubility carbon black electron transfer capacity quantitative prediction method, more than three temperature is selected and is prepared carbon black using biomass, is configured into mixed solution by adding water, mixed solution is cultured by shaker, solution is centrifuged, supernatant is filtered, and solubility carbon black solution is obtained;The concentration of solubility carbon black solution is determined, and the cyclic voltammetry curve of carbon black solution is determined using electrochemical workstation and three electrode system, the peak potential corresponding to each scanning speed in the curve, peak current are obtained, according to scanning rate, peak potential, peak current, solubility carbon black solution concentration, electron transfer rate constant k 0 It is calculated by using Bulter-Volmer equation, linear prediction model is constructed by the logarithmic value of electron transfer rate constant k 0 And pyrolysis temperature, the electron transfer capacity of carbon black at different temperatures is predicted using the model;The method is simple and easy to operate, and the electron transfer capacity of solubility carbon black of known raw material type can be directly predicted.

This invention relates to a method for antibiotic removal using struvite as a carrier during phosphorus recovery from biogas slurry, belonging to the field of water pollution control and resource regeneration. The method involves: firstly, recovering nitrogen and phosphorus from biogas slurry using struvite crystallization. The initial pH of the biogas slurry is adjusted to 8.0-10.5, and the mixture is thoroughly stirred. A certain amount of magnesium source is added to initiate the struvite crystallization reaction. Simultaneously, a certain amount of persulfate PMS oxidant is rapidly added, and the reaction pH is adjusted to 8.0-10.5. The mixture is stirred evenly, and the reaction time is controlled at 20-90 minutes, effectively removing antibiotics from the biogas slurry. This invention, while ensuring a high yield of struvite recovery from biogas slurry, accelerates electron transfer rates through struvite crystallization, improving the efficiency of PMS degradation of antibiotics. It provides a simple and effective method to reduce the ecological risks caused by antibiotics during biogas slurry struvite recovery.

The invention belongs to the technical field of photocatalysis, and provides a Fe / LCDs-TCN composite catalyst for removing organic pollutants as well as a preparation method and application thereof.The preparation method comprises the following steps: firstly, preparing carbon nitride TCN by taking melamine and urea as mixed precursors as raw materials; then, TCN is added in the process of preparing CDs and Fe raw material solutions for mixing and heating, the Fe / LCDs-TCN composite photocatalyst is prepared through thermal calcination, and molecular oxygen in air can be efficiently activated to degrade organic pollutants. The Fe / LCDs-TCN composite photocatalyst prepared by the invention has a unique hollow tubular structure, increases active sites, improves the electron transfer rate, has a good energy band structure, not only can activate oxygen to form superoxide free radicals, but also can react with water to generate hydroxyl free radicals and improve the degradation capacity of photocatalysis, does not need additional strong oxidants (PMS and the like), and is suitable for industrial production. An excellent organic pollutant degradation rate can be achieved in a mild air environment and a relatively wide pH range; and the raw materials are low in price, non-toxic and harmless, and excellent in degradation performance, and have very high application value and prospect.

The invention relates to the technical field of electrochemical sensing, in particular to a platinum-cobalt hydroxide composite material with cobalt vacancy and a preparation method and application thereof. The platinum-cobalt hydroxide composite material with the cobalt vacancies comprises foamed nickel, Pt nanoparticles and cobalt hydroxide, the cobalt hydroxide is deposited on the foamed nickel, the Pt nanoparticles are deposited on the surface of the cobalt hydroxide, and the cobalt vacancies exist in cobalt hydroxide crystal lattices. Wherein the internal electronic structure of the platinum-cobalt hydroxide composite material is changed due to the existence of the cobalt vacancy, the electron transfer rate in the platinum-cobalt hydroxide composite material is increased, and the regulation and control effect of the cobalt vacancy on the electronic structure and the synergistic catalytic effect of a platinum-cobalt hydroxide heterogeneous interface are utilized. When the platinum-cobalt hydroxide composite material with the cobalt vacancy is used as an ammonia nitrogen electrochemical detection sensitive electrode, the catalytic activity of ammoxidation reaction can be remarkably improved, so that a sensor is endowed with the detection performance of low detection limit, high sensitivity, excellent selectivity and good recovery rate.

The application relates to preparation and application of a sandwich type ECL immunosensor of a H2O2 / O2 system for signal amplification by using luminol as a luminophore and a double metal oxide, and belongs to the field of biosensing and novelty combination of new functional materials. A nickel-manganese double metal oxide (NiMnO3@Au-luminol) loaded with luminol luminophore is combined with a gold-modified cobalt-cerium double metal oxide (CoCeOx@Au) to serve as an electrochemiluminescence sensing platform, a sandwich type electrochemiluminescence immunosensor is constructed, and the sensor is used for super-sensitive detection of a non-small cell lung cancer marker CYFRA21-1. The NiMnO3 and CoCeOx materials have great application potential due to simple preparation, suitable acid-base property and multiple valence states of metals. The NiMnO3 can catalyze O2 to generate O2 •− , the CoCeOx can promote H2O2 to decompose to generate •OH, both of the two free radicals can act on Luminol •− to generate a stronger luminescence signal; Au modification on the material surface can significantly improve the electron transfer rate, increase the number of antigen-antibody combination, enhance the ECL signal, and realize sensitive and accurate detection of biomolecules.

The invention discloses a bionic photonic crystal composite material and a preparation method and application thereof, and belongs to the technical field of agricultural functional nanomaterials, the bionic photonic crystal composite material comprises a bionic structure matrix and a light energy conversion unit, the bionic structure matrix is a material with a periodic nanostructure, and the light energy conversion unit is a material with a periodic nanostructure. The lattice constant of the periodic nanostructure is 100-300 nm, so that the periodic nanostructure forms a one-dimensional photonic crystal and has a photonic band gap effect; the light energy conversion unit is modified on the surface of the bionic structure matrix or embedded in the bionic structure matrix, and the light energy conversion unit can absorb wave bands with low utilization rate of crop leaf cuticles and convert the wave bands into wave bands with high utilization rate. According to the bionic photonic crystal composite material disclosed by the invention, the light energy utilization rate and the photosynthetic electron transfer rate (ETR) of crops under weak light are remarkably improved.

Shewanella bacteria are mode electrochemically active bacteria and have bidirectional electron transfer capability, but the reverse electron transfer rate is slower. In order to solve the problem, the invention discloses a method for synchronously constructing an artificial conductive path in shewanella bacteria attachment so as to improve the electron transfer rate of a bacteria-electrode interface and the energy metabolism activity of bacteria. By utilizing the method, after dopamine is subjected to in-situ electropolymerization in the adsorption process of shewanella tamariscina PV-4, polydopamine is formed in a bacterium-electrode interface area, and the current transferred by reverse electrons is improved by 3.46 times. Due to the fact that polydopamine can serve as an artificial conductive path, the reverse electron transfer capacity of shewanella single cells is improved, and the intracellular energy metabolism level is improved through faster electron transfer.

The invention provides an AO process carbon source intelligent adding calculation method, and relates to the technical field of sewage treatment. The method comprises the following steps: S1, collecting operation parameters of an AO process system in real time, S2, calculating a core correction factor based on the operation parameters, and S3, combining the operation parameters and the core correction factor, and obtaining a basic value of the addition amount of an external carbon source through a calculation model constructed by an internal reflux ratio regulation and control formula, an aerobic terminal nitrate nitrogen concentration prediction formula, a target denitrification amount calculation formula and the like; s4, determining a feedback adjustment coefficient, and correcting the basic value of the addition amount of the external carbon source by using the feedback adjustment coefficient to obtain a final addition amount of the external carbon source; s5, judging a microbial metabolism stage according to the microbial extracellular electron transfer rate, executing a corresponding carbon source adding operation based on the metabolism stage, and adjusting an adding strategy in real time through closed-loop monitoring; the effluent total nitrogen standard-reaching rate is improved, the carbon source consumption is reduced, and the long-term operation stability and reliability are improved.

The invention discloses a preparation method of a zirconium-based metal organic framework loaded cobalt-aluminum layered double hydroxide with oxygen reduction, hydrogen evolution and oxygen evolution performances, and the preparation method comprises the following steps: taking a hexagonal cobalt-aluminum layered double hydroxide as a substrate, and fusing an octahedral zirconium metal organic framework to form a unique layered framework heterostructure. The structure is beneficial to enhancing the electrochemical performance and promoting the interaction between the electron active materials. Meanwhile, obvious hexagonal cobalt-aluminum layered double hydroxides exist on the surface of the zirconium-based metal organic framework loaded cobalt-aluminum layered double hydroxides. The observation result proves that the cobalt-aluminum layered double hydroxide is successfully deposited on the zirconium metal organic framework, and the formation of the zirconium-based metal organic framework loaded cobalt-aluminum layered double hydroxide is verified. As a three-function catalyst with efficient catalytic performance in oxygen reduction, hydrogen evolution and oxygen evolution reaction, the material fully shows excellent catalytic performance in practical application of microbial fuel cells and microbial electrolytic cells. The unique structure provides abundant active sites, and the electron transfer rate is obviously enhanced, so that the overpotential of the microbial electrolysis cell is effectively reduced, and the overall energy efficiency and operation stability of the system are improved. The invention provides a key material solution for developing a high-performance and low-cost bioelectrochemical system, and has important significance for promoting the development of a green energy technology and an environment restoration technology.

The invention discloses a preparation method of a multi-metal catalytic composite functional filler for electrochemical oxidation, which comprises the following steps: (1) mixing ferric salt, zinc salt, copper salt and chitosan in a solvent, carrying out complex reaction for a certain time, adjusting the pH value of the reaction solution to be alkaline, adding a reducing agent, and carrying out reduction reaction for a certain time to obtain a multi-metal modified chitosan solution; (2) fully and uniformly mixing activated carbon and the multi-metal modified chitosan solution; and (3) impregnating the activated carbon treated in the step (2) with a potassium permanganate solution to react for a certain time, then washing and dispersing in water, adjusting the pH value to be acidic, adding a cross-linking agent, and carrying out a cross-linking curing reaction for a certain time to obtain the multi-metal catalytic composite functional filler. Compared with the prior art, chitosan and activated carbon are compounded, Fe, Mn, Zn and Cu are synergistically introduced, the composite filler integrating conductive, adsorption and catalysis functions is constructed, and the electron transfer rate and the pollutant removal efficiency are synergistically improved.

The application discloses a method for measuring the electron transfer speed of dissolved organic matter in soil, and comprises the following steps: taking soil samples from wetland shallow soil, one layer every 2 cm, and taking more than three soil samples in total; adding the soil samples into ultrapure water to configure a suspension liquid; extracting dissolved organic matter in the soil suspension liquid by means of a shaking table oscillation, centrifugation and membrane filtration; obtaining an organic matter solution; using a three-electrode system and connecting an electrochemical workstation at room temperature; obtaining parameters such as peak current and peak potential by means of a cyclic voltammetry method; combining the concentration of the dissolved organic matter and the average molecular weight of the dissolved organic matter; and calculating the electron transfer rate constant k of the soil sample according to a Butler-Volmer equation. 0 The arithmetic mean of more than three electron transfer rate constants k 0 is calculated to represent and quantify the electron transfer speed of the dissolved organic matter in the surface layer of the wetland. The application has the advantages of simple process, convenient operation and specific quantification of the electron transfer speed of the dissolved organic matter in the shallow soil of the wetland.

The invention relates to a microorganism / polymetallic sulfide composite material as well as a preparation method and application thereof, and belongs to the technical field of crossing of environmental microorganisms and nano functional materials. The preparation method of the microorganism / polymetallic sulfide composite material comprises the following steps: (1) inoculating shewanella into an LB culture medium, and performing shake cultivation to obtain a bacterial solution; (2) centrifuging the bacterial liquid, adding precipitated bacterial sludge into an anaerobic reaction buffer solution, and then adding a water-soluble ferric iron salt solution, a water-soluble cobalt source salt solution and a water-soluble sulfur source salt solution; and carrying out shake cultivation to obtain the microorganism / polymetallic sulfide composite material. Through in-situ generation of the iron-cobalt-sulfur composite material on the surface of shewanella, stable loading and biological drive generation of nanoparticles are realized, so that the electron transfer rate and the system dechlorination efficiency are improved, the reaction life of the material is prolonged, and an efficient and sustainable pollutant removal effect is achieved.

The invention discloses a preparation method of bismuth-based nano-enzyme and application of the bismuth-based nano-enzyme in rapid detection of pesticide residues, and belongs to the technical field of analysis. The preparation method comprises the following steps: dissolving bismuth salt in a solution; preparing a GO water suspension, dispersing graphite oxide in water, and carrying out ultrasonic treatment; adding a GO water suspension into the bismuth salt solution prepared in the step S1, adding a tungsten source, and adjusting the pH to be neutral; and S3, heating the solution in the step S3 to react, collecting the precipitate after the reaction is finished, washing, drying and grinding to obtain the tungsten-bismuth-containing nano enzyme. The obtained tungsten-bismuth-containing nano-enzyme is ground and then dispersed in an aqueous solution, and the tungsten-bismuth-containing nano-enzyme can be used as the nano-enzyme for pesticide residue detection. The electron transfer rate of the material is further enhanced by synthesizing a bismuth-based material and introducing W as a cocatalyst, the bismuth tungstate nano-enzyme with high catalytic activity is obtained, and the nano-enzyme is used for rapid detection of pesticide residues, so that the detection sensitivity of the pesticide residues is improved.

The invention belongs to the technical field of electrocatalyst material preparation, and discloses a preparation method of a Mo2C / Co3Mo3C / petal-shaped three-dimensional ultrathin carbon heterostructure electrocatalyst, which comprises the following steps: dissolving salicylic acid, cobalt chloride hexahydrate and sodium molybdate dehydrate in absolute ethyl alcohol and deionized water by a simple pyrolysis method, stirring for dissolving, drying to obtain a catalyst precursor, and preparing the Mo2C / Co3Mo3C / petal-shaped three-dimensional ultrathin carbon heterostructure electrocatalyst. And putting the catalyst precursor into a crucible, introducing inert gas into a tubular furnace for annealing treatment, and washing and drying to obtain the electrocatalyst. The prepared electrocatalyst material has a unique heterostructure, provides more active sites for reaction and accelerates the electron transfer rate, so that the electrocatalytic water decomposition performance is improved.

The invention discloses a characterization method for interaction and electron transfer of nano-iron and biomacromolecules, and belongs to the field of interdisciplinary. The method comprises the following steps: (1) fixing biomacromolecules on a surface plasmon element resonance chip, injecting a nano-iron suspension through microfluidic control, and determining a binding / dissociation rate constant of nano-iron and the biomacromolecules; and (2) determining the electron transfer rate constant between the nano-iron and the biomacromolecules by utilizing spectral dynamics. According to the method disclosed by the invention, synchronous determination of the nano-iron and biomacromolecule binding dynamics and the electron transfer rate is realized through a method of combining SPR with spectral dynamics, the method has the advantages of in-situ, real-time and high sensitivity, and a reliable quantitative method is provided for evaluating the biological effect of a nano-material.

This invention discloses a boron-doped polymethylsilane with low-terminal chloride and its preparation method. The preparation method includes preparing a sodium sand mixture; mixing dichloromethylsilane, dichloromethylboron, tetrahydrofuran, and 15-crown ether-5 and then adding the mixture dropwise to the sodium sand mixture for reaction, followed by end-capping reaction. The sodium sand in this preparation method has the characteristics of uniform particle size, high activity, and clean surface. The addition of tetrahydrofuran and 15-crown ether-5 can improve the electron transfer rate, reduce the reaction activation energy, and improve the reaction efficiency. The introduction of dichloromethylboron and end-capping agent can avoid the formation of terminal chloride and introduce highly active Si-H bonds into the molecular chain. The resulting polymethylsilane has a low chloride content, high thermal crosslinking efficiency, and a narrow molecular weight distribution.

The invention provides a high-conductivity thick electrode and a preparation method and application thereof, and relates to the technical field of battery materials. The high-conductivity thick electrode provided by the invention comprises a current collector, a first electrode material layer and a second electrode material layer, wherein the first electrode material layer and the second electrode material layer are sequentially combined on the current collector from inside to outside. According to the invention, the first electrode material layer can enhance the electron transfer rate between the electrode and the current collector, and the second electrode material layer can enhance the electrolyte infiltration capability of the electrode and enhance the lithium ion diffusion efficiency. Through the electrode structure (adopting double coatings), particle size control of active substances in each layer and formula design of the conductive agent, the electrochemical reaction efficiency between ions and electrons of the whole thick electrode is enhanced, the energy density and the power density are jointly improved, and the mechanical stability of the thick electrode is improved. Therefore, the thick electrode provided by the invention has the advantages of high electron and ion transmission efficiency and good mechanical stability.

The invention discloses a carbon fluoride composite material as well as a preparation method and application thereof. The carbon fluoride composite material comprises carbon fluoride and a titanium nitride film coating the carbon fluoride. The titanium nitride film covers the surface of the carbon fluoride (CFx), so that the electron transfer rate of the carbon fluoride material is effectively improved, the prepared titanium nitride composite carbon fluoride material has a relatively high F / C ratio (1: 0.6-1.1), and the advantage of high energy density of a lithium carbon fluoride battery can be fully exerted. The material can maintain high plateau voltage in the discharge process, and the discharge voltage stability of the battery is remarkably improved. In addition, the structure of the carbon fluoride material is effectively protected through coverage of the titanium nitride film, and volume expansion and structure collapse of the carbon fluoride material in the charging and discharging process are reduced.

The invention belongs to the technical field of supercapacitor electrode materials, and discloses a preparation method of a layered double hydroxide electrode material with a nanosheet structure. Aiming at the problems of small specific surface area and low utilization rate of active sites caused by easy aggregation of a layered double hydroxide material, NiFe-MOF is uniformly coated on the surface of NiFe-LDH through a process of combining a hydrothermal method and a secondary hydrothermal method to form the core-shell structure composite electrode material. The preparation process is simple and controllable, the cost is low, the specific surface area of the obtained NiFe-LDH-coated MOF composite electrode material is remarkably increased, active sites are rich, the electron transfer rate is high, and the NiFe-LDH-coated MOF composite electrode material shows ultrahigh specific capacitance, good rate capability and cycling stability when applied to supercapacitors.

This application discloses the construction and application of an alkaline high-valence four-electron transfer tin-iron flow battery, belonging to the field of flow batteries. The positive electrode active material of the alkaline flow battery is [Fe(CN)6]. 4‑ The electrolyte has a negative electrode active material containing a high concentration of Sn(OH)6. 2‑ The electrolyte for the salt is a proton exchange membrane. An anion exchange additive is added to participate in the Sn(OH)6 electrolyte. 2‑ (SnO3 2‑ Coordination, altering Sn(OH)6 2‑ The solvation structure affects its electrochemical behavior at the interface, mainly reducing the Sn... 4+ →Sn 2+ The energy barrier encountered by the configurational change increases the electron transfer rate, reduces electrochemical polarization, and improves the poor electrochemical reversibility of tin in the high-valence four-electron transfer process in alkaline conditions. Electrode modification also addresses the issue of easy detachment of spongy tin deposits in alkaline environments. This results in excellent kinetic advantages, high battery efficiency, and good cycle stability.

This invention discloses a method for preparing high-performance and long-term durable high-current seawater electrolysis materials using Co-ZIF as a precursor. The ZIF precursor is converted into cobalt phosphide encapsulated in nitrogen-doped carbon through a phosphating process, and phosphorus vacancies are further introduced using a sodium borohydride reduction method, ultimately constructing a carbon-coated phosphorus-vacancy-rich cobalt phosphide material (Co-ZIF). x P v @NC). Utilizing this catalyst as a bifunctional electrocatalyst that serves as both the cathode and anode, under industrial seawater electrolysis conditions (electrolyte: 6M KOH seawater, temperature: 60℃), only a working voltage of 1.74V is required to achieve a 1.0A cm⁻¹ anode. ‑2 This invention provides a strategy for preparing a multi-level structured material based on ZIF, which possesses a multi-level structure composed of one-dimensional nanowires and three-dimensional ZIF polyhedra. This improves the electron transfer rate during the catalytic process and enhances the catalyst's durability. When applied to high-current electrolysis of seawater, it exhibits high activity and excellent stability.

This invention belongs to the field of wastewater treatment technology, specifically relating to a Ti3C2T x / / HEP catalyst, ozone composite catalytic packing material, its preparation method and application. The catalyst is composed of MXene sheet support and high-entropy perovskite oxide, and its preparation method is as follows: Ti3C2T x The metal salt is added to the solvent and stirred to obtain a mixture; then the ligand solution is added and stirred to form Ti3C2T. x / MOFs wet gel was dried under multi-gradient vacuum drying to obtain dry gel, which was then ground into powdered precursor; the precursor was calcined under an inert atmosphere and cooled to obtain Ti3C2T x / / HEP catalyst. The ozone composite catalytic packing material of this invention has advantages such as fast electron transfer rate, abundant active sites, high catalytic stability, and low metal leaching, and can be widely used in various industrial wastewaters for the degradation of organic matter.